Bleeding 2 weeks after my period HELP!!!!

I'm on birth control and I had my normal period 2 weeks ago and then I started my new pack of pills well I missed 2 days on the pills about 4 days ago but this morning I noticed some spotting so I put a pad on and now I've bleed threw 2 pads I never have a heavy cycle…any advice? Anyone know what's going on? PLEASE HELP!!!!!